The low Sr/Ba ratio on some extremely metal-poor stars

2014/09/30 by M. Spite, F. Spite, P. Bonifacio +3
Physics and Astronomy · #Abundance (ecology) #Astro and Planetary Science #Astrophysics #Biology #Context (archaeology) #Gamma-ray bursts and supernovae #Geology #Materials science #Metal #Metallurgy #Neutron star #Nuclear physics #Nucleosynthesis #Physics #Stars #Stellar, planetary, and galactic studies #Strontium #astro-ph.SR #r-process

paper · pdf · doi:10.1051/0004-6361/201423658

published as A&A 571, A40 (2014) · Accepted for publication in Astronomy and Astrophysics

openalex publication_date 2014/09/30 · arxiv created 2014/10/03 · arxiv updated 2014/11/05 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05

Abstract

Context. It has been noted that, in classical extremely metal-poor (EMP) stars, the abundance ratio of two well-observed neutron-capture elements, Sr and Ba, is always higher than [Sr/Ba] = –0.5, which is the value of the solar r-only process; however, a handful of EMP stars have recently been found with a very low Sr/Ba ratio.

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